5 persons standing in queue with different age group two years ago their average age will
be X and 6th person joined with them; hence the current average age has become Y. Find the
age of seventh person?

• Seventh person can have any age. It will not affect the average age of 6 persons in the group.
  
  I think some data is missing.
• 12 years agoHelpfull: Yes(6) No(2)